Folding Card Insulation Sheet U-Sleeve Displacement Prevention
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Solution Overview
Problem
Traditional electronic cards with PVC film switches often malfunction when the opening angle is too wide, causing the PVC film to pop out and lose its normal sliding track, resulting in defective products.
Innovation Solution
A folding electronic card design featuring a circuit board with a contact plate, elastic sheet, and a U-shaped snap-engaging sleeve that confines the insulation sheet, ensuring it slides within a fixed direction and prevents displacement, using a PVC film as the insulation sheet and optionally including a button battery and speaker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional PVC film switch mechanism is used, then the structure is simple, but the PVC film may pop out when the opening angle is too wide, resulting in defective products
Solution Approach 1:
The insulation sheet is divided into a fixed end and a movable end, with the movable end inserted into the U-shaped snap-engaging sleeve. This segmentation allows the insulation sheet to be constrained in a controlled manner, preventing it from popping out while maintaining the simplicity of the overall structure.
Solution Approach 2:
The U-shaped snap-engaging sleeve acts as an intermediary component between the insulation sheet and the circuit board. It provides a guiding and constraining structure that ensures the insulation sheet moves along the correct track without popping out, thereby maintaining switch functionality while keeping the design relatively simple.
2Ease of operation
If the insulation sheet is allowed to slide freely, then the ease of operation is improved, but the insulation sheet may displace and fall out during the sliding process
Solution Approach 1:
The movable end of the insulation sheet is inserted into the U-shaped snap-engaging sleeve, creating a nested structure. This allows the insulation sheet to slide smoothly within the confined space of the sleeve while being prevented from displacing or falling out, thus maintaining both ease of operation and positional stability.
Solution Approach 2:
The U-shaped snap-engaging sleeve adds a vertical dimension of constraint by extending downward from the circuit board surface. This creates a three-dimensional confined space that guides the insulation sheet's movement in the horizontal plane while preventing displacement in the vertical direction, ensuring stable operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively prevents insulation sheet displacement, reduces defect rates, simplifies production, and lowers costs by ensuring the insulation sheet slides within a defined path, maintaining functionality across various angles.
Implementation Method 1
an elastic sheet provided on the circuit board and acting as a switch, the elastic sheet resiliently being pressed against the contact plate
Implementation Method 2
a U-shaped snap-engaging sleeve provided on the circuit board and located above the contact plate and the elastic sheet, the insulation sheet being slidably inserted in the U-shaped snap-engaging sleeve
Data Source
Figure 1
Figure 2
AI summary
A folding electronic card with secured switch connection includes a circuit board (6) and an insulation sheet (8); a contact plate (2) and an elastic sheet (4) provided on the circuit board and acting as a switch, the elastic sheet resiliently pressed against the contact plate, the insulation sheet being slidable between the contact plate and the elastic sheet; a U-shaped snap-engaging sleeve (7) provided on the circuit board and located above the contact plate and the elastic sheet, the insulation sheet being slidably inserted in the U-shaped snap-engaging sleeve, one end of the insulation sheet being provided with a through hole, the circuit board and a fixed end of the insulation sheet being fixed on two sides of a folding electronic card respectively. The electronic card with secured switch connection is advantageous in that it can prevent displacement of the insulation sheet. The card also comprises a speaker (3) and a battery (5).